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        <section id="main"><article id="post-React-router" class="article article-type-post" itemscope itemprop="blogPost">
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  <time datetime="2019-10-30T10:32:00.000Z" itemprop="datePublished">2019-10-30</time>
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      React-router
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<h2 id="react-router-的理解"><a href="#react-router-的理解" class="headerlink" title="react-router 的理解"></a>react-router 的理解</h2><ol>
<li><p>react 的一个插件库</p>
</li>
<li><p>专门用来实现一个 SPA 应用</p>
</li>
<li><p>基于 react 的项目基本都会用到此库</p>
</li>
</ol>
<h2 id="SPA-的理解"><a href="#SPA-的理解" class="headerlink" title="SPA 的理解"></a>SPA 的理解</h2><ol>
<li><p>单页 Web 应用（single page web application）</p>
</li>
<li><p>整个应用只有一个完整的页面</p>
</li>
<li><p>点击页面中的链接不会刷新页面，本身也不会向服务器发请求</p>
</li>
<li><p>当点击链接时，只会做页面的局部更新</p>
</li>
<li><p>数据都需要通过 ajax 请求获取，并在前端异步展现</p>
</li>
</ol>
<h2 id="路由的理解"><a href="#路由的理解" class="headerlink" title="路由的理解"></a>路由的理解</h2><h3 id="什么是路由"><a href="#什么是路由" class="headerlink" title="什么是路由"></a>什么是路由</h3><ul>
<li><p>一个路由就是一个映射关系(key: value)</p>
</li>
<li><p>key 为路由路径，value 可能是 function/component</p>
</li>
</ul>
<h3 id="路由分类"><a href="#路由分类" class="headerlink" title="路由分类"></a>路由分类</h3><ul>
<li><p>后台路由：node 服务器端路由，value 是function，用来处理客户端提交的请求并返回一个响应数据</p>
</li>
<li><p>前台路由：浏览器端路由，value 是 component，当请求的是路由 path 时，浏览器端前没有发送 HTTP 请求，但界面会更新显示对应的组件</p>
</li>
</ul>
<h3 id="后台路由"><a href="#后台路由" class="headerlink" title="后台路由"></a>后台路由</h3><ul>
<li><p>注册路由：router.get(path, function(req, res))</p>
</li>
<li><p>当 node 接收到一个请求时，根据请求路径找到匹配的路由，调用路由中的函数来处理请求，返回响应数据</p>
</li>
</ul>
<h3 id="前端路由"><a href="#前端路由" class="headerlink" title="前端路由"></a>前端路由</h3><ul>
<li><p>注册路由：<code>&lt;Route path=&#39;/about&#39; component={About}&gt;</code></p>
</li>
<li><p>当浏览器的 hash 变为 #about 时，当前路由组件就会变成 About 组件</p>
</li>
</ul>
<h2 id="react-router-相关-API"><a href="#react-router-相关-API" class="headerlink" title="react-router 相关 API"></a>react-router 相关 API</h2><h3 id="组件"><a href="#组件" class="headerlink" title="组件"></a>组件</h3><ul>
<li><p><code>&lt;BrowerRouter</code></p>
</li>
<li><p><code>&lt;HashRouter&gt;</code></p>
</li>
<li><p><code>&lt;Router&gt;</code></p>
</li>
<li><p><code>&lt;Redirect&gt;</code>：默认选中路由</p>
</li>
<li><p><code>&lt;Link&gt;</code></p>
</li>
<li><p><code>&lt;NavLink&gt;</code></p>
</li>
<li><p><code>&lt;Switch&gt;</code>：其中的<code>&lt;Route&gt;</code>在路径相同的情况下，只匹配第一个，这个可以避免重复匹配</p>
</li>
</ul>
<h3 id="其他"><a href="#其他" class="headerlink" title="其他"></a>其他</h3><ul>
<li><p>history 对象</p>
</li>
<li><p>match 对象</p>
</li>
<li><p>withRouter 函数</p>
</li>
</ul>

      
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